fix: run all clients on stainless SDK, fix workflow, properly commit recordings (#4410)

# What does this PR do?

Various fixes to integration test recording + stainless calling of
integration tests:

1. only the library client was being run, they all should be
2. the git check grabs diffs like:

M tests/integration/client-typescript/package-lock.json
 M tests/integration/client-typescript/package.json

it should not

additionally:

Fixes rebase conflicts when stainless workflow runs integration tests
with
  record-if-missing mode on PRs. Previously, the workflow would:
  1. Commit all files in tests/integration/ (including non-recordings)
  2. Try to rebase and push to 'main' instead of the PR branch
  3. Fail with merge conflicts on PR-specific changes

  Changes:
- Add pr_head_ref and is_fork_pr parameters flowing through workflow
chain
- Use target-branch input instead of github.ref_name in recording
commits
- Detect and handle fork PRs by skipping push and uploading recordings
as artifacts
  - Add 7-day artifact retention for fork PR recordings
  - Support both workflow_call and direct pull_request trigger contexts

For same-repo PRs: recordings now commit/push to the PR branch correctly
For fork PRs: recordings upload as downloadable artifacts with
instructions


you can see a failing workflow:
5846590613
with the rebase issues.

---------

Signed-off-by: Charlie Doern <cdoern@redhat.com>

.github/workflows/integration-tests.yml

@@ -52,6 +52,15 @@ on:
         required: false
         type: string
         description: 'The SHA of the pull request head to checkout'
+      pr_head_ref:
+        required: false
+        type: string
+        description: 'The branch name of the pull request head (for recording commits)'
+      is_fork_pr:
+        required: false
+        type: boolean
+        default: false
+        description: 'Whether this is a fork PR (cannot push recordings to forks)'
       test-all-client-versions:
         required: false
         type: boolean
@@ -150,3 +159,5 @@ jobs:
           setup: ${{ matrix.config.setup }}
           inference-mode: ${{ matrix.config.inference_mode || 'replay' }}
           suite: ${{ matrix.config.suite }}
+          target-branch: ${{ inputs.pr_head_ref || '' }}
+          is-fork-pr: ${{ inputs.is_fork_pr && 'true' || (github.event.pull_request.head.repo.full_name != github.repository && 'true' || 'false') }}